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post #1 of 14 (permalink) Old 12-27-2009, 09:29 PM Thread Starter
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Exclamation Altenator??

Hello again DI.net-ers,

I was driving back from Chicago today when my car started acting up. While driving on the freeway the red electrical warning light came on and stayed on (the one that looks like a battery). Then maybe 20min later the abs light started blinking. Then the car started jerking and the interior lights and headlights started to dim, like it was losing power. I thought that it might be because I had the heat on, the defrost on, radio, and was charging my cell phone, but Ive done this all before no problem. So I unplugged and turned off the items i just mentioned. This seemed to get rid of the problem.

But its 15 degrees outside so I have to keep defrosting the front window every 5 minutes. Maybe 20min later the car really started to lose power again so I exited the freeway and headed to the nearest gas station. Once at the gas station I turned off the ignition and tried to restart the car, nothing.... no crank at all. The interior and exterior lights, radio, heater all still worked but were dim.

I had someone jump my car and let it run for a bit while parked but less than 5 minutes later it was died again. Called AAA and had it towed (thank god for AAA+).

I'm thinking alternator, but wanted to check with my DI.net peeps first


If so, how easy is it to change out the alternator??? anyone have steps??

btw... the trep is a 1994 3.5 (pictured below)

Thanks as always!!
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post #2 of 14 (permalink) Old 12-27-2009, 09:54 PM
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well i know when the car is running it should be charging the battery. If the car is dead and u went to start it if u got a click it would be the battery. i would have the battery checked under a load. if that passes then im leaning towards the alternator also. the shop manual is on this site for the 1st gen car. It should be on top of all the other posts where u posted.
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post #3 of 14 (permalink) Old 12-27-2009, 09:59 PM
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Could be the alternator. Id also check the battery, and its connections.

You could take the alternator into Autozone and they will test it for you.
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post #4 of 14 (permalink) Old 12-27-2009, 10:38 PM
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I'm thinking it's the alternator.

Alternator
REMOVAL & INSTALLATION

3.5L Engine

See Figure 10

1.Disconnect the negative battery cable.
2.Loosen the lower mounting bolt but do not remove it.
3.Loosen the pivot bolt, but do not remove it.



4.Loosen the belt adjusting bolt.
5.Remove the alternator drive belt.
6.Remove the bracket.
7.Remove the lower mounting bolt and pivot bolt.
8.Remove the alternator.
9.Disconnect the alternator field circuit plug.
10.Remove the B+ terminal nut and wire.

To install:

11.Attach the alternator and bracket to the engine, then tighten the mounting bolts to 40 ft. lbs. (54 Nm).
12.Install the drive belt onto the alternator pulley. Make certain that the belt is seated correctly on the pulley.
13.Install and tighten the B+ terminal nut and wire to 75 inch lbs. (9 Nm) onto the new alternator.
14.Connect the alternator field circuit plug.
15.Connect the negative battery cable.


2003 Jeep Grand Cherokee my current DD

1995 3.5L Intrepid, Sold in 2010
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post #5 of 14 (permalink) Old 12-27-2009, 10:56 PM Thread Starter
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Thumbs down

STRONGT is the mutha****in man!
you come through like relatives when there's free food!!!! Consistently!


Quote:
Originally Posted by Strongt View Post
I'm thinking it's the alternator.

Alternator
REMOVAL & INSTALLATION

3.5L Engine

See Figure 10

1.Disconnect the negative battery cable.
2.Loosen the lower mounting bolt but do not remove it.
3.Loosen the pivot bolt, but do not remove it.



4.Loosen the belt adjusting bolt.
5.Remove the alternator drive belt.
6.Remove the bracket.
7.Remove the lower mounting bolt and pivot bolt.
8.Remove the alternator.
9.Disconnect the alternator field circuit plug.
10.Remove the B+ terminal nut and wire.

To install:

11.Attach the alternator and bracket to the engine, then tighten the mounting bolts to 40 ft. lbs. (54 Nm).
12.Install the drive belt onto the alternator pulley. Make certain that the belt is seated correctly on the pulley.
13.Install and tighten the B+ terminal nut and wire to 75 inch lbs. (9 Nm) onto the new alternator.
14.Connect the alternator field circuit plug.
15.Connect the negative battery cable.
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post #6 of 14 (permalink) Old 12-27-2009, 11:08 PM
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damn strongt how the hell did u put that diagram into the post. nice work man
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post #7 of 14 (permalink) Old 12-28-2009, 01:36 AM
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It's nothing. I'm just trying to help members out like I've been doing for awhile now.
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post #8 of 14 (permalink) Old 12-28-2009, 09:13 AM Thread Starter
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Yeah man, you've been helping me and the green machine out for at least the last 3 or 4 years (many others as well for im sure longer).

Much appreciated!

I'll give a status update this evening.
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post #9 of 14 (permalink) Old 12-28-2009, 12:06 PM Thread Starter
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Arrow

Ok, so I got a rebuilt alternator from advanced auto this morning. Got home and started to look at what I was about to get myself into. I
I looked at the battery terminals and noticed that the wires running from the positive terminal were loose to the point of falling out... re-tightened the wires, got a jump from my fathers car. been running since.

I'm gonna take it for a spin and see what happens. maybe run back to advance auto and have them check the battery and alt anyway.
Wish me luck.

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post #10 of 14 (permalink) Old 12-28-2009, 02:33 PM
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Make a routine of checking the connectors at the battery and the posts (positive and negative). This could help you avoid future problems.
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post #11 of 14 (permalink) Old 12-28-2009, 06:43 PM Thread Starter
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ok...
battery was completely dead, recharged at Advance Auto. Drove the car for 45 minutes or so, parked and then it didnt start again. I'm gonna make sure one more time that this battery isnt junk, but looks like next step is alternator swap.
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post #12 of 14 (permalink) Old 12-28-2009, 08:46 PM
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The battery has to be completely charged to test, bring back to Advanced, charge, then test it... and while you're bringing it to Advanced, bring the alternator along for a test too.
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post #13 of 14 (permalink) Old 12-29-2009, 08:57 PM Thread Starter
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old alternator was shot! so was the battery! Installed a new alternator following StrongT's step by step listed above, except i couldn't get the bracket off, so I had to do a lot of wiggling, battery was still under warranty so they swaped it for a new one (luck me). Long story short, im back on the road.

Thanks for you help everyone!!!!

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post #14 of 14 (permalink) Old 12-30-2009, 12:15 AM
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With the car running off the battery, the battery was discharged too deeply for this cold weather you've had... those two things in combination killed the battery.

Glad they replaced it under warranty, and that you got your alternator swapped! Glad she's back on the road!
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